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大黄鱼精子的超微结构
引用本文:尤永隆,林丹军.大黄鱼精子的超微结构[J].动物学报,1997,43(2):119-126.
作者姓名:尤永隆  林丹军
作者单位:福建师范大学生物工程学院
摘    要:大黄鱼的精子由头产和尾部两部分组成。头部结构较为独特,其腹侧有一较大的细胞核,背部有中心粒复合体。头部的后端是袖套。细胞核的腹面稍向外突出背面则稍向内凹。细胞核中的染以质浓缩成致密的团块状。团块状的染色质之间分布着松散的纤维状染色质。植入窝位于细胞核的背部表面,由细胞核背面向内凹陷而成,呈一沟状,其走向与精子的长轴平行。

关 键 词:鱼纲  大黄鱼  精子  超微结构

THE ULTRASTRUCTURE OF THE SPERMATOZOON OF THE TELEOST, PSEUDOSCIAENA CROCEA (RICHARDSON)
YOU Yong Long\,LIN Dan Jun.THE ULTRASTRUCTURE OF THE SPERMATOZOON OF THE TELEOST, PSEUDOSCIAENA CROCEA (RICHARDSON)[J].Acta Zoologica Sinica,1997,43(2):119-126.
Authors:YOU Yong Long\  LIN Dan Jun
Abstract:The spermatozoon of the teleost, Pseudosciaena crocea (Richardson) consists of two parts: the head and the tail (flagellum). The structure of the head is quite special. A large nucleus is located at the ventral part of the head. The dorsal part of the head is occupied by the centriolar complex. The posterior end of the head is the sleeve. The ventral surface of the nucleus is convex,whereas the dorsal surface of the nucleus is concave.Within the nucleus the chromatin condenses into wads,among which are loose chromatin fibers. The implantation fossa is on the dorsal surface of the nucleus. It is groove like running from the anterior end to the posterior end of the nucleus. The centriolar complex is in the implantation fossa. The proximal centriole is perpendicular to the major axis of the spermatozoon,whereas the basal body is parallel to the major axis of the spermatozoon. The anterior end of the basal body is roll like. It is electron dense, with some microtubules in it. The posterior end of the basal body splits into 9 strips. The sleeve contains several mitochondria and vesicles. Within the cytoplasm of the sleeve, there is a membrane which is near and parallel to, as well as thinner than the inner membrane of the sleeve. The tail, which is thin and long, stretches out of the central space of the sleeve. It consists of a principal piece and an end piece. The central structure of the principal piece is axoneme. There is only a little cytoplasm outside the axoneme. The 9 doublets of the axoneme is connected to the 9 strips of the posterior end of the basal body. The initial part of the axoneme is special in structure: there is no central pair of the single microtubule, the doublets of it are electron dense, and there are no dynein arms on the doublets. At the end of the principal piece, the microtubules, which constitute the axoneme, spiral to become a basket like structure.Several microtubules extend into the end piece of the tail.
Keywords:Pseudosciaena crocea(Richardson)  Spermatozoon  Ultrastructure  Implantation fossa  Centriolar complex  Basket like structure
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